Pyrite
Iron Disulfide (FeS2)
Mineral
Category
Sedimentary (Fossiliferous)
Browse sedimentary (fossiliferous) specimens identified by the Rock Identifier community.
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Orange Calcite (likely polished specimen)
Calcite
Mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Weathered Pyrite Nodule
Iron Sulfide (FeS2) undergoing oxidation to limonite/goethite
mineral
Felsic gneiss, likely granitic gneiss
Quartz–feldspar–mica gneiss; commonly quartz + plagioclase/K-feldspar + biotite or hornblende
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Sandstone (Ferruginous)
Sandstone (primarily SiO2 with Iron Oxide cement)
sedimentary
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
sedimentary
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
mineral
Banded sandstone pebble
Quartz-rich sandstone (predominantly quartz, with feldspar and iron-oxide cement)
sedimentary
Weathered quartz-bearing sandstone
Quartz arenite or feldspathic sandstone (tentative)
sedimentary
Green Sandstone Pebble (River/Beach Pebble)
Glauconitic Sandstone
sedimentary
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
sedimentary
Fossilized Fish (Lepidotes)
Lepidotes sp. (Order: Lepisosteiformes)
sedimentary
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Sedimentary Pebble (Sandstone)
Clastic Sedimentary Rock (SiO2 dominant)
sedimentary
Chalk (Sedimentary Limestone)
Calcium Carbonate (CaCO3) - Bioclastic Limestone
sedimentary
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil
Argillite (with Barnacles)
Argillite (metamorphosed mudstone/shale)
metamorphic
Fossilized Limestone with Crinoid Stem
Carboniferous Limestone (containing Crinoidea ossicles)
fossil
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone / Quartzite
Sedimentary quartz arenite
sedimentary
Sandstone
Arenite (Silicon Dioxide with various mineral cements)
sedimentary
Banded Slate Pebble
Metamorphosed Mudstone / Slate
metamorphic
Sandstone
Clastic Sedimentary Rock
sedimentary
Conglomerate
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Argillite / Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Sedimentary quartz arenite
sedimentary
Bituminous Coal
Coal (Sedimentary Rock)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary